ICD-10-CM Code For Injury Of Nerves At Lower Leg Level: Group Overview

The International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) code group S84 includes traumatic and specified injuries to peripheral nerves at the level of the lower leg, covering lesions to the tibial nerve, common peroneal (fibular) nerve, superficial and deep branches, and unspecified lower leg nerves. These ICD-10-CM diagnosis codes are used to document clinical encounters for nerve laceration, compression, stretch, or traumatic disruption at the lower leg, capturing details about anatomic site and laterality where specified. Accurate coding within the ICD-10-CM S84 group supports proper claim adjudication, complete clinical documentation, and appropriate reimbursement.

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ICD-10-CM S84: Injury Of Nerves At Lower Leg Level Overview

This group includes acute and specified injuries to nerves at the level of the lower leg, affecting peripheral nerve function of the tibial, peroneal (fibular), and other named or unspecified nerves. It targets the peripheral nervous system in the lower extremity and includes traumatic and specified nerve lesions that can cause motor, sensory, or mixed deficits. Accurate coding captures the anatomic site and severity of nerve injury, which supports proper claim adjudication and clinical records.

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ICD-10-CM Code For Injury Of Nerves At Lower Leg Level: Group Overview

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ICD-10-CM S84: Injury Of Nerves At Lower Leg Level Overview

When to Use

Use a code from this group when the clinical documentation indicates a traumatic nerve injury localized to the lower leg, including laceration, crush, stretch, or compression injuries of named or unspecified nerves. Select the code that specifies the exact nerve, laterality, and any associated open wound or encounter type as documented in the medical record.

ICD-10-CM Codes

45 rows

ICD-10-CM Code	Description
S84.00XA	Injury of tibial nerve at lower leg level, unspecified leg, initial encounter
S84.00XD	Injury of tibial nerve at lower leg level, unspecified leg, subsequent encounter
S84.00XS	Injury of tibial nerve at lower leg level, unspecified leg, sequela
S84.01XA	Injury of tibial nerve at lower leg level, right leg, initial encounter
S84.01XD	Injury of tibial nerve at lower leg level, right leg, subsequent encounter
S84.01XS	Injury of tibial nerve at lower leg level, right leg, sequela
S84.02XA	Injury of tibial nerve at lower leg level, left leg, initial encounter
S84.02XD	Injury of tibial nerve at lower leg level, left leg, subsequent encounter
S84.02XS	Injury of tibial nerve at lower leg level, left leg, sequela
S84.10XA	Injury of peroneal nerve at lower leg level, unspecified leg, initial encounter
S84.10XD	Injury of peroneal nerve at lower leg level, unspecified leg, subsequent encounter
S84.10XS	Injury of peroneal nerve at lower leg level, unspecified leg, sequela
S84.11XA	Injury of peroneal nerve at lower leg level, right leg, initial encounter
S84.11XD	Injury of peroneal nerve at lower leg level, right leg, subsequent encounter
S84.11XS	Injury of peroneal nerve at lower leg level, right leg, sequela
S84.12XA	Injury of peroneal nerve at lower leg level, left leg, initial encounter
S84.12XD	Injury of peroneal nerve at lower leg level, left leg, subsequent encounter
S84.12XS	Injury of peroneal nerve at lower leg level, left leg, sequela
S84.20XA	Injury of cutaneous sensory nerve at lower leg level, unspecified leg, initial encounter
S84.20XD	Injury of cutaneous sensory nerve at lower leg level, unspecified leg, subsequent encounter

Showing 1–20 of 45

DRG Codes

10 rows

DRG Code	Description
073	Cranial and Peripheral Nerve Disorders with MCC
074	Cranial and Peripheral Nerve Disorders without MCC
091	Other Disorders of Nervous System with MCC
092	Other Disorders of Nervous System with CC
093	Other Disorders of Nervous System without CC/MCC
949	Aftercare with CC/MCC
950	Aftercare without CC/MCC
963	Other Multiple Significant Trauma with MCC
964	Other Multiple Significant Trauma with CC
965	Other Multiple Significant Trauma without CC/MCC

Related Codes

S80-SUPERFICIAL-INJURY-KNEE-LOWER-LEG

ICD-10-CM Code For Superficial Injury Of Knee And Lower Leg: Group Overview

S81-OPEN-WOUND-KNEE-LOWER-LEG

ICD-10-CM Code For Open Wound Of Knee And Lower Leg: Group Overview

S82-FRACTURE-OF-LOWER-LEG

ICD-10-CM Code For Fracture Of Lower Leg, Including Ankle: Group Overview

S83-DISLOCATION-AND-SPRAIN-OF-KNEE

ICD-10-CM Code For Dislocation And Sprain Of Joints And Ligaments Of Knee: Group Overview

S85-INJURY-OF-BLOOD-VESSELS-LOWER-LEG

ICD-10-CM Code For Injury Of Blood Vessels At Lower Leg Level: Group Overview

S87-CRUSHING-INJURY-LOWER-LEG

ICD-10-CM Code For Crushing Injury Of Lower Leg: Group Overview

S88-TRAUMATIC-AMPUTATION-OF-LOWER-LEG

ICD-10-CM Code For Traumatic Amputation Of Lower Leg: Group Overview

S89-OTHER-AND-UNSPECIFIED-INJURIES-OF-LOWER-LEG

ICD-10-CM Code For Other And Unspecified Injuries Of Lower Leg: Group Overview

Frequently Asked Questions

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.

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When to Use

ICD-10-CM Codes

45 rows

ICD-10-CM Code	Description
S84.00XA	Injury of tibial nerve at lower leg level, unspecified leg, initial encounter
S84.00XD	Injury of tibial nerve at lower leg level, unspecified leg, subsequent encounter
S84.00XS	Injury of tibial nerve at lower leg level, unspecified leg, sequela
S84.01XA	Injury of tibial nerve at lower leg level, right leg, initial encounter
S84.01XD	Injury of tibial nerve at lower leg level, right leg, subsequent encounter
S84.01XS	Injury of tibial nerve at lower leg level, right leg, sequela
S84.02XA	Injury of tibial nerve at lower leg level, left leg, initial encounter
S84.02XD	Injury of tibial nerve at lower leg level, left leg, subsequent encounter
S84.02XS	Injury of tibial nerve at lower leg level, left leg, sequela
S84.10XA	Injury of peroneal nerve at lower leg level, unspecified leg, initial encounter
S84.10XD	Injury of peroneal nerve at lower leg level, unspecified leg, subsequent encounter
S84.10XS	Injury of peroneal nerve at lower leg level, unspecified leg, sequela
S84.11XA	Injury of peroneal nerve at lower leg level, right leg, initial encounter
S84.11XD	Injury of peroneal nerve at lower leg level, right leg, subsequent encounter
S84.11XS	Injury of peroneal nerve at lower leg level, right leg, sequela
S84.12XA	Injury of peroneal nerve at lower leg level, left leg, initial encounter
S84.12XD	Injury of peroneal nerve at lower leg level, left leg, subsequent encounter
S84.12XS	Injury of peroneal nerve at lower leg level, left leg, sequela
S84.20XA	Injury of cutaneous sensory nerve at lower leg level, unspecified leg, initial encounter
S84.20XD	Injury of cutaneous sensory nerve at lower leg level, unspecified leg, subsequent encounter

Showing 1–20 of 45

DRG Codes

10 rows

DRG Code	Description
073	Cranial and Peripheral Nerve Disorders with MCC
074	Cranial and Peripheral Nerve Disorders without MCC
091	Other Disorders of Nervous System with MCC
092	Other Disorders of Nervous System with CC
093	Other Disorders of Nervous System without CC/MCC
949	Aftercare with CC/MCC
950	Aftercare without CC/MCC
963	Other Multiple Significant Trauma with MCC
964	Other Multiple Significant Trauma with CC
965	Other Multiple Significant Trauma without CC/MCC

Related Codes

S80-SUPERFICIAL-INJURY-KNEE-LOWER-LEG

ICD-10-CM Code For Superficial Injury Of Knee And Lower Leg: Group Overview

S81-OPEN-WOUND-KNEE-LOWER-LEG

ICD-10-CM Code For Open Wound Of Knee And Lower Leg: Group Overview

S82-FRACTURE-OF-LOWER-LEG

ICD-10-CM Code For Fracture Of Lower Leg, Including Ankle: Group Overview

S83-DISLOCATION-AND-SPRAIN-OF-KNEE

ICD-10-CM Code For Dislocation And Sprain Of Joints And Ligaments Of Knee: Group Overview

S85-INJURY-OF-BLOOD-VESSELS-LOWER-LEG

ICD-10-CM Code For Injury Of Blood Vessels At Lower Leg Level: Group Overview

S87-CRUSHING-INJURY-LOWER-LEG

ICD-10-CM Code For Crushing Injury Of Lower Leg: Group Overview

S88-TRAUMATIC-AMPUTATION-OF-LOWER-LEG

ICD-10-CM Code For Traumatic Amputation Of Lower Leg: Group Overview

S89-OTHER-AND-UNSPECIFIED-INJURIES-OF-LOWER-LEG

ICD-10-CM Code For Other And Unspecified Injuries Of Lower Leg: Group Overview

Frequently Asked Questions

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.

Published by

Trek Health powers OpenPayer with a leading commercial payer intelligence platform, seamlessly converting fragmented payer data into actionable insights for provider organizations.

ICD-10-CM Code For Injury Of Nerves At Lower Leg Level: Group Overview

Sign up for ICD-10-CM Code For Injury Of Nerves At Lower Leg Level: Group Overview policy alerts

ICD-10-CM S84: Injury Of Nerves At Lower Leg Level Overview

ICD-10-CM Code For Injury Of Nerves At Lower Leg Level: Group Overview

Sign up for ICD-10-CM Code For Injury Of Nerves At Lower Leg Level: Group Overview policy alerts

ICD-10-CM S84: Injury Of Nerves At Lower Leg Level Overview

When to Use

ICD-10-CM Codes

DRG Codes

Related Codes

Which nerves are included in the ICD-10-CM S84 group?

How does the S84 group capture laterality and encounter type for coding?

What clinical situations are documented using S84 codes?

Can S84 codes affect DRG assignment for inpatient claims?

How should coders select the correct S84 code from the list provided?

References

When to Use

ICD-10-CM Codes

DRG Codes

Related Codes

Which nerves are included in the ICD-10-CM S84 group?

How does the S84 group capture laterality and encounter type for coding?

What clinical situations are documented using S84 codes?

Can S84 codes affect DRG assignment for inpatient claims?

How should coders select the correct S84 code from the list provided?

References